[Yung-Wei Holding] Announcement on Behalf of Subsidiary Shih-Feng Power Co., Ltd. Regarding Change in Chairman

1. Date of board resolution or date of change: 2026/05/18 2. Personnel category (please enter Chairman or General Manager): Chairman 3. Name of former appointee: Not applicable 4. Resume of former appointee: Not applicable 5. Name of new appointee: Liao Kuei-Lung 6. Resume of new appointee: Chairman of Shin-Shin Natural Gas Co., Ltd. 7. Nature of change (please enter "resignation", "dismissal", "expiration of term", "position adjustment", "layoff", "retirement", "death", or "new appointment"): new appointment 8. Reason for change: new appointment 9. Effective date of new appointment: 2026/05/18 10. Other matters to be specified (if the subject of the event or resolution is a public company, this material information also complies with matters that have a significant impact on shareholder rights or securities prices as stipulated in Article 7, Paragraph 6 of the Enforcement Rules of the Securities and Exchange Act): None